Although Time Warner Cable is now Spectrum and wide-dhcpv6 is quite old, this post is still what I’m using today (in 2019)! I’ve written about how to get larger IPv6 subnets from Time Warner Cable’s Road Runner service on a Mikrotik router before, but I’ve converted to using a Linux server as my router for my home. Getting the larger /56 IPv6 subnet is a little tricky and it’s not terribly well documented.